New: Slack Integration →

Your Intelligence Infrastructure for Shopify CRO

HI Engine connects to Shopify and finds what’s costing you conversions, sizes every issue - then writes and publishes the theme change for you.

HI Engine connects to Shopify and finds what’s costing you conversions, sizes every issue, then writes and publishes the theme change for you.

Book A Demo

It runs in a loop. Automatically.

Find, size, ship, test — and every result feeds the next round. The system keeps learning your store as long as it runs.

Opportunities

Variant selector fails on mobile

€410/mo

Shipping cost shown too late

€280/mo

Size guide hidden on mobile

€150/mo

Find

HI Engine reads Shopify and CRO data continuously, surfaces conversion leaks, and explains what changed in plain language.

Why did conversion drop last week?

Mobile checkout drop-off rose 14% after Tuesday’s theme update. I’ve sized two fixes — combined estimate €640/month. Both are ready for your review.

Size

Every opportunity is ranked by severity and estimated €/month impact, so the next move is clear. The most relevant ideas are turned into visual mockups.

HI engine – sticky add to cart

Draft theme · Just now

Published

Theme Check passed

0 errors

Ship

Approve the fix and HI Agent writes the theme code, validates it, and publishes safely to a draft theme.

Sticky add to cart — Variant B

A/B test · Running

Winner

Conversion lift validated

+8.4%

Test

Split the audience and let your customers decide what is actually working.

Execution layer

It doesn’t stop at the recommendation. It ships the fix.

Approve an action and HI Engine writes the theme code, validates it against Shopify Theme Check, and publishes it to a draft theme named after the task — ready for your review before anything reaches a customer. Every change is logged and one click from reverted.

Get your first 4 fixes

HI engine – sticky add to cart

Awaiting your review

✓ Theme code written

✓ Shopify Theme Check passed · 0 errors

✓ Published to draft theme

✓ Change log saved

Review draft

Roll back

Slack integration

Run your CRO work from Slack with @hi agent

Connect, ask, and act from your workspace. New ideas, visual mockups, development previews, test results, and a CRO sparring partner stay where your team already works.

New ideas and visual mockups

Development previews in-channel

Results and expert sparring

Get your first 4 fixes

A/B testing

Split the audience. Prove what works.

Every approved improvement can be tested against the current experience. Customers decide the winner, so every shipped change is backed by measured conversion results.

Audience split automatically

Conversion lift measured

Winning variant ready to publish

Get your first 4 fixes

A/B test result

Variant A · Current experience 4.8%

Variant B · HI Agent improvement 5.2%

Winner · Variant B +8.4%

COMPARISON

What do you get — and what is left for your team?

HI Engine combines analysis, prioritization, and implementation into one continuous workflow.

Criteria

RECOMMENDED

HI Engine

CRO agency

Shopify apps

In-house team

Implements the fix

Yes — writes and publishes the theme code for you

Varies; often recommendations plus separate development

No — provides the tool, you make the changes

Yes, with both a developer and CRO expertise

Time to first fix

One day

2–4 weeks to get started

Quick setup, but the work remains yours

Days to weeks, if capacity is available

Prioritization

Every finding valued in €/month

Consultant estimate, rarely measured in €

Data, but no ready-made € estimate

Manual and time-consuming

Optimization pace

Continuous, monitors data 24/7

Monthly meetings or sprints

Whenever you have time

When other work allows

Response time

Slack 24/7

SLA 24h

1–3 days

Depends on availability

Theme safety

Draft theme + Theme Check + one-click rollback

Depends on the team; handled manually

Some modify the theme; the risk is yours

Your responsibility

Reporting

Real-time, live GA4 and Shopify data

Monthly slide deck

Dashboard, interpreted by you

Manual reports

Transparency

Every change logged and reversible

You see the results, not the work

You see the data

Full visibility, but it is on your shoulders

Pricing

From €299/month, based on the number of changes

€3–8k/month retainer

Monthly fee per app — the stack keeps growing

Salaries and internal time

Words from merchants

“I can get a mockup before it’s built, and modify it if needed. Once the task is done, I get a preview of the layout before deciding whether to publish it or make further changes. I’m really impressed with how efficient and easy it is to use.”

Emmi Nguyen

Puhdistamo

“For us, HI Engine did for CRO what Canva did for design.”

Kyle

Founder at Swoveralls

“After more than a decade in product management and e-commerce, I know how much work goes into improving conversion. HI Engine takes so much of that work and does it for you. It’s an incredibly impressive tool.”

Elizabeth

Co-Founder, The Great Fantastic (ex-Brooklinen)

When should you consider HI Engine?

You already have traffic, data, and ideas. The question is whether your next improvement ships — or stays in the backlog.

01 · SIGNAL

You have traffic, but not enough time to find the leak.

HI Engine turns store signals into a ranked, priced list of opportunities your team can act on.

02 · BOTTLENECK

Your reports are right, but the backlog keeps growing.

This is for teams that need implementation, not another deck explaining what should happen next.

03 · EXECUTION

You want fixes shipped safely, not just suggested.

Every change is checked, logged, and reversible before it reaches the live store.

Pay after it works.

Start with an extended one-month trial. We connect your store, plug HI Engine into Slack, and ship at least four completed fixes in month one. You pay when they’re live and you’ve seen what they did.

Get your first 4 fixes

Dashboard agent

Ask your store a question. Get an answer, not a dashboard.

Why did conversion drop last week?

Mobile checkout drop-off rose 14% after Tuesday’s theme update. I’ve sized two fixes — combined estimate €640/month. Both are ready for your review.

Conversational CRO assistant

Ask what changed in conversion or mobile AOV, and get an answer grounded in your live store data.

HI Engine

✓ Shopify Theme Check passed · Published to draft: HI engine – sticky add to cart

Sticky add-to-cart on mobile product pages

✓ Theme code written

✓ Theme Check passed · 0 errors

✓ Published to draft theme

Severity-ranked idea library

Every opportunity, ranked by severity, with implementation status from approval to live.

Opportunities

Variant selector fails on mobile

€410/mo

Shipping cost shown too late

€280/mo

Size guide hidden on mobile

€150/mo

Shopify Theme Check validation

Every modification is checked against Shopify specs before it reaches your draft theme.

€410/month

Variant selector fails on mobile taps

46% of taps fail · 8 of 31 orders on this page

Calculating €/month impact…

Execution logs & rollback

See what changed, why it changed, and undo every fix in one click.

HI engine – sticky add to cart

Published to draft theme

Theme Check passed

Auto-learned brand knowledge

HI Engine reads your storefront identity, catalog and trust signals without overwriting manual edits.

Connected in five minutes.

Connect the tools already running your store. HI Engine starts reading live context without replacing your stack.

Theme safety

It touches your theme. Here’s why that’s safe.

Nothing reaches your live theme without your approval. Every change publishes to a separate draft theme first, is validated against Shopify Theme Check — schema violations, constraint errors and block ID collisions caught before they ship — and stays fully logged with one-click rollback. Your data is processed securely and stays yours.